阅读说明：本技术 一种难降解废水处理的催化剂、制备方法及制备设备 (Catalyst for treating refractory wastewater, preparation method and preparation equipment ) 是由 徐忠杨 强舜 匡金陶 鲁超 于 2021-01-21 设计创作，主要内容包括：本发明公开了一种难降解废水处理的催化剂,包括纳米零价铁、粉末活性炭和石墨烯的第一组分和与硝酸铜的第二组分,本发明还公开了难降解废水处理的催化剂的制备方法,包括如下步骤：制备纳米零价铁；将各原料按质量比混合；将硝酸铜按质量比投入第一组分中,并加入催化双氧水和催化过硫酸盐即可制得催化剂；本发明还公开了难降解废水处理的催化剂的制备装置,包括混合结构、合成结构和排放结构,混合结构包括入料口、分散阀和混合腔体,分散阀包括设有若干通孔的阀叶、转动轴和倾斜管,本发明通过用催化剂来解决难降解的废水,并对催化剂的制备方法进行改进,合理配合原料的固体细粒,有效提升混合的均匀程度,也即提升催化剂的性能。(The invention discloses a catalyst for treating refractory wastewater, which comprises a first component of nano zero-valent iron, powdered activated carbon and graphene and a second component of copper nitrate, and also discloses a preparation method of the catalyst for treating refractory wastewater, which comprises the following steps: preparing nano zero-valent iron; mixing the raw materials according to the mass ratio; adding copper nitrate into the first component according to the mass ratio, and adding catalytic hydrogen peroxide and catalytic persulfate to obtain a catalyst; the invention also discloses a preparation device of the catalyst for treating the refractory wastewater, which comprises a mixing structure, a synthesis structure and a discharge structure, wherein the mixing structure comprises a feeding port, a dispersion valve and a mixing cavity, and the dispersion valve comprises a valve leaf provided with a plurality of through holes, a rotating shaft and an inclined pipe.)

1. A catalyst for treating refractory wastewater is characterized by comprising a first component and a second component, wherein the first component comprises a mixture of a first component and a second component in a mass ratio of 10: 2-3: 0.02-0.05 of nano zero-valent iron, powdered activated carbon and graphene, wherein the second component comprises copper nitrate, and the mass ratio of the copper nitrate to the graphene of the first component is 4: 0.5 to 1.

2. The catalyst for treating refractory wastewater as claimed in claim 1, wherein the dosage mass ratio of the first component to wastewater is 0.001-0.002: 1, the mass ratio of the second component to the wastewater is 0.0001-0.0002: 1.

3. the method for preparing the catalyst for treating the refractory wastewater according to claim 2, comprising the following steps:

preparing nano zero-valent iron;

mixing the nano zero-valent iron, the activated powdered carbon and the graphene according to a mass ratio to prepare a first component;

and putting copper nitrate into the first component according to the mass ratio, and adding catalytic hydrogen peroxide and catalytic persulfate to obtain the catalyst.

4. The device for preparing the catalyst for treating refractory wastewater according to claim 3, comprising a mixing structure, a synthesizing structure and a discharging structure, wherein the mixing structure is arranged on the upper side of the synthesizing structure and communicated with the synthesizing structure, the synthesizing structure is arranged on the upper side of the discharging structure and communicated with the discharging structure, the mixing structure comprises a feed inlet, a dispersion valve and a mixing cavity, the dispersion valve is arranged on the lower side of the feed inlet and rotatably connected with the feed inlet, the mixing cavity is arranged on the lower side of the dispersion valve and communicated with the feed inlet through the dispersion valve, the dispersion valve comprises a valve leaf provided with a plurality of through holes, a rotating shaft and an inclined pipe, the rotating shaft is rotatably connected with the inclined pipe and arranged inside the inclined pipe, and the valve leaf is arranged around the rotating shaft, the through holes penetrate through the valve leaf along the thickness direction of the valve leaf and are arranged inside the valve leaf, and the inclined pipe is communicated with the feeding port and the mixing cavity.

5. The apparatus of claim 4, wherein the inclined tube has an air inlet and a swirl baffle, the air inlet extends through the inclined tube, and the swirl baffle is disposed along the length of the inclined tube and is fixedly connected to the inclined tube.

6. The apparatus of claim 5, wherein the mixing chamber comprises an outer chamber with a discharge port, a filter screen and a mixing valve, the mixing valve is disposed at a lower side of the outer chamber and rotatably connected to the outer chamber, the filter screen is disposed at an upper side of the outer chamber, the discharge port is disposed at a lower side of the outer chamber and communicates the synthetic structure and the outer chamber.

Technical Field

The invention relates to the technical field of wastewater treatment, in particular to a catalyst for treating refractory wastewater, a preparation method and preparation equipment.

Background

Advanced oxidation technology is usually adopted for advanced treatment of wastewater, an activating agent of the advanced oxidation technology is mainly transition metal and derivatives thereof, for refractory wastewater, due to stable structure and strong oxidation resistance, the effect obtained by conventional advanced oxidation and catalyst activating oxidation can not reach the expected effect, so that the medicament consumption is large, and meanwhile, in the preparation process of the catalyst, the catalyst is difficult to produce continuously due to the particularity of raw materials.

Disclosure of Invention

The invention provides a catalyst for treating refractory wastewater, a preparation method and preparation equipment, aiming at solving the problems that the prior catalyst for treating wastewater has insufficient wastewater treatment capability and the catalyst is difficult to prepare and produce continuously.

A catalyst for treating refractory wastewater, which comprises a first component and a second component, wherein the first component comprises a mixture of a first component and a second component in a mass ratio of 10: 2-3: 0.02-0.05 of nano zero-valent iron, powdered activated carbon and graphene, wherein the second component comprises copper nitrate, and the mass ratio of the copper nitrate to the graphene of the first component is 4: 0.5 to 1.

Wherein the dosage mass ratio of the first component to the wastewater is 0.001-0.002: 1, the mass ratio of the second component to the wastewater is 0.0001-0.0002: 1.

the preparation method of the catalyst for treating the refractory wastewater comprises the following steps:

preparing nano zero-valent iron;

mixing the nano zero-valent iron, the activated powdered carbon and the graphene according to a mass ratio to prepare a first component;

and putting copper nitrate into the first component according to the mass ratio, and adding catalytic hydrogen peroxide and catalytic persulfate to obtain the catalyst.

The preparation device for the catalyst for treating the refractory wastewater comprises a mixing structure, a synthetic structure and a discharge structure, wherein the mixing structure is arranged on the upper side of the synthetic structure and is communicated with the synthetic structure, the synthetic structure is arranged on the upper side of the discharge structure and is communicated with the discharge structure, the mixing structure comprises a feeding port, a dispersion valve and a mixing cavity, the dispersion valve is arranged on the lower side of the feeding port and is rotatably connected with the feeding port, the mixing cavity is arranged on the lower side of the dispersion valve and is communicated with the feeding port through the dispersion valve, the dispersion valve comprises a valve leaf provided with a plurality of through holes, a rotating shaft and an inclined pipe, the rotating shaft is rotatably connected with the inclined pipe and is arranged in the inclined pipe, and the valve leaf is arranged around the rotating shaft, the through holes penetrate through the valve leaf along the thickness direction of the valve leaf and are arranged inside the valve leaf, and the inclined pipe is communicated with the feeding port and the mixing cavity.

The inclined pipe is provided with an air inlet and a rotary baffle, the air inlet penetrates through the inclined pipe, and the rotary baffle is arranged along the length extending direction of the inclined pipe and is fixedly connected with the inclined pipe.

Wherein, mix the cavity including outside cavity, filter screen and the stirring valve that is equipped with the discharge gate, the stirring valve set up in the downside of outside cavity, and with outside cavity rotates to be connected, the filter screen set up in the upside of outside cavity, the discharge gate set up in the downside of outside cavity, and communicate synthetic structure with outside cavity.

The invention has the beneficial effects that: by providing the catalyst for treating the refractory wastewater, the preparation method and the preparation equipment, the refractory wastewater is treated by using the catalyst, the preparation method of the catalyst is improved, and a carbon-copper-iron reduction system is formed by using the nano zero-valent iron, the activated powdered carbon, the graphene and the copper nitrate, so that the degradation capability of the catalyst is improved, the preparation equipment is improved, solid fine particles of raw materials are reasonably matched, the uniformity of mixing is effectively improved, and the performance of the catalyst is also improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a catalyst preparation apparatus for refractory wastewater treatment according to the present invention.

FIG. 2 is a schematic sectional view of a stirring valve of a catalyst preparation apparatus for refractory wastewater treatment according to the present invention.

FIG. 3 is a schematic diagram of the preparation steps of a method for preparing a catalyst for treating refractory wastewater according to the present invention.

FIG. 4 is a schematic diagram of the preparation steps of the nano zero-valent iron of the preparation method of the catalyst for treating refractory wastewater.

10-mixing structure, 20-synthesizing structure, 30-discharging structure, 11-feeding port, 12-dispersing valve, 13-mixing cavity, 121-through hole, 122-valve blade, 123-rotating shaft, 124-inclined tube, 125-air inlet, 126-rotary baffle, 131-external cavity, 132-filter screen, 133-stirring valve, 134-discharging port, 135-rotating blade, 136-rotating rod and 137-hollow pipeline.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 4, the present invention provides a technical solution:

a catalyst for treating refractory wastewater, which comprises a first component and a second component, wherein the first component comprises a mixture of a first component and a second component in a mass ratio of 10: 2-3: 0.02-0.05 of nano zero-valent iron, powdered activated carbon and graphene, wherein the second component comprises copper nitrate, and the mass ratio of the copper nitrate to the graphene of the first component is 4: 0.5 to 1.

Further, the mass ratio of the first component to the wastewater is 0.001-0.002: 1, the mass ratio of the second component to the wastewater is 0.0001-0.0002: 1.

the preparation method of the catalyst for treating the refractory wastewater comprises the following steps:

s101: preparing nano zero-valent iron;

s102: mixing the nano zero-valent iron, the activated powdered carbon and the graphene according to a mass ratio to prepare a first component;

s103: and putting copper nitrate into the first component according to the mass ratio, and adding catalytic hydrogen peroxide and catalytic persulfate to obtain the catalyst.

The preparation of the nano zero-valent iron comprises the following steps:

s201: putting iron balls with the diameter of 1.8-2 mm, iron powder and p-nitrophenol into a polytetrafluoroethylene ball grinding pot;

s202: putting the polytetrafluoroethylene ball milling pot into a microwave oven for microwave-assisted ball milling to obtain the nano zero-valent iron.

The specific embodiment is as follows:

the COD of the secondary treated effluent of a certain disperse dye production plant in Zhejiang is 796-896 mg/L, the former Fenton treatment process of the enterprise is used for carrying out three-stage treatment, the COD of the effluent is always 600mg/L, the removal rate is 20-25%, the COD of the effluent is always 278-316 mg/L by using the equipment, the process and the catalyst of the invention, the pipe inlet standard of a centralized sewage treatment plant in the current stage is met, and the COD is below 500 mg/L.

The preparation device for the catalyst for treating the refractory wastewater comprises a mixing structure 10, a synthetic structure 20 and a discharge structure 30, wherein the mixing structure 10 is arranged on the upper side of the synthetic structure 20 and communicated with the synthetic structure 20, the synthetic structure 20 is arranged on the upper side of the discharge structure 30 and communicated with the discharge structure 30, the mixing structure 10 comprises a feed inlet 11, a dispersion valve 12 and a mixing cavity 13, the dispersion valve 12 is arranged on the lower side of the feed inlet 11 and rotatably connected with the feed inlet 11, the mixing cavity 13 is arranged on the lower side of the dispersion valve 12 and communicated with the feed inlet 11 through the dispersion valve 12, the dispersion valve 12 comprises a valve leaf 122 provided with a plurality of through holes 121, a rotating shaft 123 and an inclined pipe 124, and the rotating shaft 123 is rotatably connected with the inclined pipe 124, the valve blade 122 is arranged around the rotating shaft 123, the through holes 121 penetrate through the valve blade 122 along the thickness direction of the valve blade 122 and are arranged inside the valve blade 122, and the inclined pipe 124 is communicated with the feeding port 11 and the mixing cavity 13.

In this embodiment, the mixing structure 10 is used for mixing to prepare a first component, the synthesizing structure 20 is used for synthesizing to prepare a catalyst, the discharging structure 30 is used for discharging the prepared catalyst, the feeding port 11 is used for feeding a solid raw material, the dispersing valve 12 is used for dispersing the solid raw material, the mixing cavity 13 is used for carrying and mixing to prepare the first component, the valve vane 122 is used for stirring the raw material to enable the raw material to be fully mixed, the rotating shaft 123 is used for driving the valve vane 122 to rotate and is externally connected with a motor, and the inclined tube 124 is used for enabling the fed raw material to automatically enter the mixing cavity 13 under the action of gravity.

Further, the inclined pipe 124 has an air inlet 125 and a swirl baffle 126, the air inlet 125 penetrates through the inclined pipe 124, and the swirl baffle 126 is disposed along the length extending direction of the inclined pipe 124 and is fixedly connected with the inclined pipe 124.

In this embodiment, the air inlet 125 is externally connected to an air pump and pumps air, so that the raw material can be dispersed in the inclined tube 124, and the rotary baffle 126 prevents the raw material from flowing back to the material inlet 11.

Further, mix cavity 13 including outside cavity 131, filter screen 132 and the stirring valve 133 that is equipped with discharge gate 134, stirring valve 133 set up in the downside of outside cavity 131, and with outside cavity 131 rotates to be connected, filter screen 132 set up in the upside of outside cavity 131, discharge gate 134 set up in the downside of outside cavity 131, and communicate composite structure 20 with outside cavity 131.

In this embodiment, the outer cavity 131 is used for synthesizing the first component, the discharge hole 134 is used for discharging the first component into the synthesizing structure 20 to prepare the catalyst, the filter screen 132 is used for filtering the bulk impurities, and the stirring valve 133 is used for improving the uniformity of the first component.

Further, the stirring valve 133 includes a rotating blade 135 and a rotating rod 136, the rotating rod 136 set up in the center of the external cavity 131, and with the external cavity 131 rotates to be connected, the rotating blade 135 encircles the rotating rod 136 sets up, the rotating blade 135 includes a brush and a connecting rod, the connecting rod connects the rotating blade 135 with the rotating rod 136, the brush set up in the downside of the rotating blade 135.

In this embodiment, the rotating blade 135 is used to drive the raw material in the foreign language cavity to rotate so as to achieve mixing, the rotating rod 136 is used to transmit rotation to the rotating blade 135, the rotating blade 135 is provided with a hollow pipe 137, and the hollow pipe 137 connects the rotating blade 136 and the rotating blade 135 to transport gas, so that the first component can be sufficiently mixed.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.